I do have a Mares yoke, yoke nut, and yoke screw. They are in excellent condition, as they came off of a Mares regulator that I converted over to DIN. I did try the Argonaut yoke screw, and it is the proper thread size. I did not try the yoke nut, but as Luis, has indicated, it is the same thread size. If you are interested in the set, let me know through my email at [email protected]
. I can send you photos through an email.